Merge pull request #374 from leider/master

better page titles and first og implementation
Merge pull request #375 from leider/master

small changes in open graph tagging
quick fix for links in open graph description
Merge commit 'ac371d53a3db7ae1a3d99abb77314ec67719b20e'

# Via Andreas Leidig (1) and Nicole Rauch (1)
* commit 'ac371d53a3db7ae1a3d99abb77314ec67719b20e':